| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h42m 50.0549s[1] |
| Declination | −37° 18′ 48.661″[1] |
| Apparent magnitude (V) | 4.59[2] |
| Characteristics | |
| Spectral type | K1.5 IIIb CN0.5[3] |
| B−V color index | 1.191±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.90±0.07[4] km/s |
| Proper motion (μ) | RA: −91.264(70) mas/yr[1] Dec.: −70.315(85) mas/yr[1] |
| Parallax (π) | 18.5379 ± 0.0757 mas[1] |
| Distance | 175.9 ± 0.7 ly (53.9 ± 0.2 pc) |
| Absolute magnitude (MV) | 0.83[2] |
| Details[4] | |
| Mass | 1.18±0.18 M☉ |
| Radius | 11.01±0.35 R☉ |
| Luminosity | 63.1+9.3 −8.1 L☉ |
| Surface gravity (log g) | 2.56±0.05 cgs |
| Temperature | 4,581±26 K |
| Metallicity [Fe/H] | +0.03±0.06 dex |
| Rotational velocity (v sin i) | 1.70±0.43 km/s |
| Age | 4.57±1.83 Gyr |
| Other designations | |
h Eri, CD−37° 1415, FK5 2265, HD 23319, HIP 17351, HR 1143, SAO 194475[5] | |
| Database references | |
| SIMBAD | data |
HD 23319 (h Eridani) is an orange-hued star in the constellation Eridanus. It has an apparent visual magnitude of 4.59,[2] which is sufficiently bright to make it visible to the naked eye. The distance to HD 23319 can be estimated from its annual parallax shiftof18.5 mas,[1] which yields a range of about 176 light years. It is moving further away from the Earth with a heliocentric radial velocity of +9.9 km/s.[4]
This is an aging giant star with a stellar classificationofK1.5 IIIb CN0.5,[3] where the suffix notation indicates the spectrum shows a mild overabundance of the cyano radical. It is a red clump giant, indicating it is on the horizontal branch and is generating energy through helium fusion at its core.[6] The star has 1.2 times the mass of the Sun and, at the age of 4.6 billion years, has expanded to 11 times the Sun's radius. It is radiating 63 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,581 K.[4]
|
| |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| Stars |
| ||||||||||||
| |||||||||||||
| Nebulae |
| ||||||||||||
| Galaxies |
| ||||||||||||
| |||||||||||||
| |||||||||||||
